funny stuff

does the Pope wear a funny hat

Obviously! Rhetorical question in response to a question where the answer is an emphatic yes.

funny bone

The ulnar nerve in the elbow, which, when hit, causes a tingling sensation.

funny man

Alternative form of funnyman.

hot stuff

An attractive person. (often used as a come-on or pickup line)

I'm not being funny

Used as a softening preface to a statement that might be taken as offensive or malicious.

made of sterner stuff

strong and determined (especially more so than someone else, to whom one is being compared).

sleep funny

To sleep in a position resulting in muscle or joint pain upon waking.

strut one's stuff

To behave or perform in a showy or ostentatious manner, as if to impress others; to show off.