one's bottom dollar/ bet one's bottom dollar

[vil]

Dear teachers,

Would you be kind enough to tell me whether I am right with my interpretation of the expressions in bold in the following sentences?

“I tell you I’ve gone it head-first, as if it was our bottom dollar. (Stewnson’s “The Wrecker”)

one’s bottom dollar = one’s last dollar

bet one’s bottom dollar = to be very certain of something; to bet in complete certainty of winning

I bet my bottom dollar you never ever went to Bulgaria!

Thank you for your efforts.

Regards,

V.

[Rover_KE]

Correct.