Second-person singular simple present form of leap.(verb)
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Use "leapest" in a sentence
"And when the king saw one come hurling over his head he said: Fellow, what art thou, and what is the cause thou leapest out at that window?"
"Light though thou be, thou leapest out of darkness; but I am darkness leaping out of light, leaping out of thee!"
"To him good Aeneas speaks in bitter words: 'Lucagus, no slackness in thy coursers' flight hath betrayed thee, or vain shadow of the foe turned them back; thyself thou leapest off the harnessed wheels. '"