hands down

Short definition from Wiktionary

Adverb

1. 1
   without much effort; easily
2. 2
   by a large margin (in a game or contest)
3. 3
   without question; undoubtedly
4. 4
   Used other than figuratively or idiomatically: see hands, down.
5. 5
   Alternative form of hands down.

Verb

1. 1
   third-person singular simple present indicative of hand down