Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
If this is you, she suggests pulling your tailbone back and then tipping it up — if you're a butt clencher, the crease will decrease or go away completely, she says.
Source: https://www.popsugar.com/fitness/what-is-butt-clenching-49309793