when you nail your one rep max like its a piece of piss. applicable in other areas of difficulty that have been overcome with ease and style
see that deadlift? - "aaaall day"
guy1 - you really sure you can get the basket ball in the hoop from here!?
guy2 - all day
random guy - you think you can get with mehdi's work buddy?
karl - *grins* .. "all day"
mehdi - stop fucking saying that!