Basically I just check/fold overpairs unless I raised preflop. Here's an example (just can't get the converter to work, sorry):



Dealt to Hero [ Ad Jd Jc Ah ]
Rabbit24 folds.
JFrankHunt calls [$0.50].
cornholio54 calls [$0.50].
Hero calls [$0.50].
fhfrankiet folds.
superG3 folds.
mic13p calls [$0.50].
Marinadca calls [$0.50].
Golfanite calls [$0.25].
griffinite1 checks.

** Dealing Flop ** [ Qs, 5c, 3c ]
Golfanite checks.
griffinite1 checks.
JFrankHunt checks.
cornholio54 checks.
Hero checks.
mic13p checks.
Marinadca checks.

** Dealing Turn ** [ 8s ]
Golfanite checks.
griffinite1 checks.
JFrankHunt checks.
cornholio54 checks.
Hero checks.
mic13p bets [$1].
Marinadca calls [$1].
Golfanite folds.
griffinite1 calls [$1].
JFrankHunt calls [$1].
cornholio54 folds.
Hero folds.

** Dealing River ** [ 5h ]
griffinite1 checks.
JFrankHunt checks.
mic13p checks.
Marinadca checks.
griffinite1 shows [ 8h, Tc, 2h, 4d ] two pairs, eights and fives.
griffinite1 shows 8,5,4,3,2 for low.
JFrankHunt doesn't show [ 3s, Jh, Ks, 7d ] two pairs, fives and threes.
mic13p shows [ Qc, 8d, As, 6s ] two pairs, queens and eights.
mic13p shows 8,6,5,3,A for low.
Marinadca doesn't show [ Ac, Qd, 6c, 3d ] two pairs, queens and fives.
Marinadca doesn't show 8,6,5,3,A for low.
mic13p wins $3.50 from the main pot with two pairs, queens and eights.
griffinite1 wins Lo ($3.50) from the main pot with 8,5,4,3,2.

Should I be "defending" my overpair here?

No reason at all to bet with that many players in. I know if you've played holdem it sounds odd to lay down a pair of aces on that flop but in this situation it's a complete nothing hand.

** Dealing down cards **
Dealt to Hero [ Ts Ac As 3h ]
M_ace checks.
Am241 folds.
xBPny calls [$0.50].
uncleal13 calls [$0.50].
The_TaiPan folds.
brick1932 folds.
russ755 folds.
Oldweasel folds.
Hero calls [$0.25].
sixn8 checks.

** Dealing Flop ** [ 7h, 3s, 5d ]
Hero checks.
sixn8 checks.
M_ace bets [$0.50].
xBPny calls [$0.50].
uncleal13 calls [$0.50].
Hero calls [$0.50].
sixn8 calls [$0.50].

** Dealing Turn ** [ Td ]
Hero checks.
sixn8 checks.
M_ace bets [$1].
xBPny folds.
uncleal13 calls [$1].
Hero calls [$1].
sixn8 calls [$1].

** Dealing River ** [ Ad ]
Hero checks.
sixn8 checks.
M_ace bets [$1].
uncleal13 calls [$1].
Hero raises [$2].
sixn8 folds.
M_ace calls [$1].
uncleal13 calls [$1].
Hero shows [ Ts, Ac, As, 3h ] three of a kind, aces.
M_ace shows [ 4d, Tc, Ah, 6h ] a straight, three to seven.
M_ace shows 6,5,4,3,A for low.
uncleal13 shows [ 6d, Jc, Qc, 7d ] a flush, ace high.
uncleal13 shows 7,6,5,3,A for low.
uncleal13 wins $7.13 from the main pot with a flush, ace high.
M_ace wins Lo ($7.12) from the main pot with 6,5,4,3,A.



I'm a muppet.

The wise Todd Brunson (and any hi-lo top player) always advocates your starting hands should ALWAYS be able to have the chance of scooping...there's no money in half the pot (usually); especially since you so often risk the chance of getting quartered in big pots.

I agree with Kuso. In most .5/1 games you can make money drawing at the naked nut low.