JackTwo
The card you desperately need on the river after you went all in with a jack-two offsuit, thinking you were about to win, but the other guy actually had something decent and you need two pair to even have a shot at not getting completely embarrassed.
I went all-in with a jack-two offsuit. He had a pair of kings. I needed a two and a three just to not look like a complete moron.
I bet my last chip with a jack-two offsuit. He had a queen and a ten. I needed a two and a three to not get totally trashed.
I called his all-in with a jack-two offsuit. He had a straight. I needed a two and a three to not get completely annihilated.