Senses
猛劲儿/ 猛勁兒 a spurt of energy
a sudden burst or spurt of energy; great vigor; a dash
猛劲儿/ 猛勁兒 to exert oneself
to put on a spurt; to suddenly concentrate one's strength or efforts; to dash
猛劲儿/ 猛勁兒 vigorously
(colloquial) vigorously; with great force; without restraint or to one's heart's content