When the CO moves all in as well do I give this up or just yell yeehaaw and call!

Stack sizes:
UTG: $13.30
CO: $16.40
Button: $37.30
TableTiger1: $24
BB: $25.25

Pre-flop: (5 players) TableTiger1 is SB with
UTG calls, CO calls, Button folds, TableTiger1 calls, BB raises to $1, UTG calls, CO calls, TableTiger1 calls.

Flop: ($4, 4 players)
TableTiger1 bets $4, BB calls, UTG raises all-in $12.3, CO raises all-in $15.4

Definitely flat call here, then fist pump.