make a mountain
make a mountainand pitch a tent
n. to have a morning erection that raises the covers; to have an erection that makes a bulge in one’s clothing; to get an erection. Bobby makes a mountain almost every morning. When I was in the hospital, I was afraid I would pitch a tent in the morning.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.