make (something) neat or of the required size or form by cutting away irregular or unwanted parts.
trim the grass using a sharp mower
decorate (something), typically with contrasting items or pieces of material.
a pair of black leather gloves trimmed with fake fur
adjust (sails) to take best advantage of the wind.
While trimming sails as a beginner, Pogell discovered that the sport was an ideal vehicle for personal growth.
get the better of (someone), typically by cheating them out of money.
rebuke (someone) angrily.