The initial idioms of the letter L

lose (one's) buttons	lose (one's) cherry
lose a bundle	lose all one’s marbles
lose appetite	lose at
lose (one's) bearings	lose by
lose contact with	lose cool
lose count of	lose edge
lose face	lose (one's) faith (in something or someone)
lose favor	lose (one's) footing
lose grip	lose hold on
lose ground	lose ground to
lose head	lose heart
lose heart to	lose (one's) shit
lose (one's) spirit	lose (one's)/the way
lose in	lose it
blow lunch	lose marbles