(idiomatic, especially military, of a fighting person, unit, or vehicle) To make one's opponent pay a very high price to defeat or obtain (a person, unit, vehicle, or territory).

plural of sell-off

(idiomatic) To persuade people to go against their best interests or to accept something unnecessary or preposterous.

(African-American Vernacular) To make threats or boasts, especially if empty and/or if made to intimidate someone.

(idiomatic) To abandon one's spiritual values or moral principles for wealth or other benefits.

(transitive, idiomatic) To betray, especially in a manner which causes serious difficulty for the one betrayed.

present participle of sell past the close

To continue trying to convince a customer of the benefits of making a purchase after the customer has already decided to make that purchase; to oversell.

To belittle oneself in judgment; to underestimate oneself and one's abilities (and thus avoid being acknowledged to the deserved extent).

(UK) To sell something of little worth, pretending that it is something else of greater value.