Having a wager by habit or subconsciously without thought of even the wager itself.
Gambling in an unquantifiable way.
man2: Yeah im just off to the pub!
man1: Bet you fall over in the next 5 minutes!
Man2: Bet i only graze 1 limb!
Man1: Bet its a martian you trip over!
etc. etc.. *Gamblail*