top' dog'

1. a person, group, or nation that has acquired a position of highest authority.
2. the winner of a competition or rivalry; champion: He was determined to be top dog at the swimming meet.
3. Animal Behav.the alpha male or alpha female in a dominance hierarchy.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

topcoattop dollar
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