Idiot End: the bad end of a straight, i.e. you hold 4-5 and the board is 6-7-8, you’re holding the idiot end of the straight if another player is holding 9-10.

Implicit Collusion: In a tournament where, for example, only the top 9 players are paid and there are 10 remaining (the last being short-stacked), implicit collusion involves all players at the table flat-calling through the river for the maximum likelihood that the short stack be busted by having all hands see the finish. This strategy is never mentionned at the table, merely assumed.

Implied Odds: The odds you are getting after the assumed result of betting for the remainder of the hand.

Insight Straight (Draw): see Belly Buster