boff vs give someone the time

boff

• to have sexual intercourse (with someone) 

• To hit; to strike. 

• A great success; a hit. 

• A pupil who works hard; a swot. 

• A line in a film etc that elicits such a laugh. 

• A big laugh. 

• A hit or smack. 

give someone the time

• To have sexual intercourse with.