bet one's bottom dollar
To be absolutely sure of something; to be certain enough of something to wager everything.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“I would bet my bottom dollar that he arrives late.”
“She knows her sister so well that she would bet her bottom dollar she is lying about the party.”
“Given his consistent track record of success, I would bet my bottom dollar that his latest business venture will yield significant profits by the end of the year.”
- 01
a day late and a dollar short
Too late and too feeble to achieve the desired effect.
- 02
abound in one's own sense
To follow one’s own inclinations and opinions.
- 03
ace up one's sleeve
A surprise advantage of which others are not aware.
- 04
act one's age
To behave in a manner appropriate to one's age.
- 05
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 06
afraid of one's own shadow
Exceptionally timid.
- 07
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 08
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
Last updated August 10, 2026