simple past tense and past participle of balls up

Third-person singular simple present indicative form of balls up

present participle of balls up

Third-person singular simple present indicative form of double up

To study particularly hard to learn a subject quickly.

Third-person singular simple present indicative form of bone up

simple past tense and past participle of bone up

present participle of bone up

An increase or rise; usually said of prices, fees, or rates. / (often attributive) A machine that utilizes jacks or hydraulic lifts.

Third-person singular simple present indicative form of 'fess up