Boost

Webster's Dictionary of the English Language

·noun A push from behind, as to one who is endeavoring to climb; help.

II. Boost ·vi To lift or push from behind (one who is endeavoring to climb); to push up; hence, to assist in overcoming obstacles, or in making advancement.

Related Words

to boost
To lift or raise by pushing.--Webster. Chiefly used by boys, who apply it to the act of pushing one...

Dictionary of American Words And Phrases by John Russell Bartlett.