To gain bravery, or be outgoing in manner. Frequently used in the Army. Example: Private Wilkinson, you had best sack up and jump out of this airplane.
SACK UP
Meaning of SACK UP in English
Slang English vocab. Английский сленговый словарь. 2012
To gain bravery, or be outgoing in manner. Frequently used in the Army. Example: Private Wilkinson, you had best sack up and jump out of this airplane.
Slang English vocab. Английский сленговый словарь. 2012