(obsolete except non-native speakers' English) For what reason; why.

Used as an intensifier to emphasize typicality of behavior / Used other than figuratively or idiomatically: see for, you.

Used as an intensifier for actions causing harm or detriment to someone / Used to indicate that an action normally beneficial may be performed in a way that causes harm or detriment to someone.

In a mood to fight; looking to argue or quarrel with someone.

Alternative form of you don't get something for nothing

One cannot expect to receive some benefit if one does not pay for it in some way or does not face a counterbalancing hazard or harm.

present participle of ask for trouble

Life is short, so you should enjoy it while you can. / In speaking pejoratively of epicurean beliefs.

Alternative form of eye for an eye

To produce or result in revenue which will cover its costs.