slang To have an erection while lying naked beneath a sheet, such that the sheet rises like a tent away from one's torso. My husband is always pitching a tent first thing in the morning.

Why do they call it pitching a tent?

The oldest sense of pitch that's immediately relevant is that of thrusting a stake or pole into the ground (which is why we talk about pitching a tent). The sense of a playing field comes via that, originally from cricket.

What do you know about pitching a tent?