The Vietnamese phrase "cắp đít" is a colloquial expression that means to leave or go away quietly, often without saying anything. It is informal and can carry a slightly negative connotation, indicating that someone is leaving in a sneaky or abrupt manner.
In more advanced contexts, you might use "cắp đít" to indicate a sense of frustration or betrayal when someone leaves without explanation. For instance, if a friend abruptly leaves a gathering without saying goodbye, you could express your annoyance using this phrase.
While "cắp đít" primarily means to leave quietly, it can also express a general sentiment of avoidance or evasion in social situations.