Literal translation
to remove oneself from in front
Meaning
to clear off, disappear
Explanation
The regional French use of se lever to mean "to remove" is a Provençalism calqued on leva. Literally, "to lift oneself from in front" means "to get out of other people's way", usually rendered by si leva dóu mitan, "to lift oneself from the middle", but the expression took on a more definitive meaning: to vanish, to go far away. So saying "lève-toi de devant" means "out of my sight!" rather than "please move aside". The ambiguity with the ordinary French meaning has reduced its use in this precise sense to unambiguous contexts.