I thought I'd 'bust a gut' (laughing) when you showed up in that silly outfit.
What makes some people want to 'spill their guts' on national television?
He knew he had to trust his 'gut' [='instincts'] and do what felt right.
(..) - Enough of this twaddle. Come on! Not quite what you hoped for, Mr Powell? Oh, Lara, I have a gut instinct about this. After all, you are the daughter of a genius. Let me test my theory. You had to let him go. No more bubbles. (..)2001 Lara Croft: Tomb Raider