Sinusoidal

When someone is moody or in a mood usually due to a lack of sex or not having a regular masturbating schedule in place. Derived from the fact that the sine wave traverses up and down like the mood of a bipolar bitch.

‘Yo Amelia, you’re so sinusoidal today’
‘Fuck off, I didn’t get rattled last night’
‘Oh, that explains it then’