Here's a breakdown:
* nos: means "we"
* ficamos: is the informal form of the verb "quedarnos," which means "to stay" or "to remain"
* ca: is a slang term for "here" or "in this place"
* dentro: means "inside"
So, the phrase "nos ficamos ca dentro" literally means "we stay here inside."
However, the meaning can be slightly different depending on the context. It can also express:
* "We're staying here" - indicating that the speaker and others will remain in the current location.
* "We're staying put" - suggesting a decision to stay, possibly despite some external pressure or temptation to leave.
* "We're staying in" - implying that they will not be going out.
It's important to note that while this phrase is understood in certain regions, it may not be understood in all Spanish-speaking areas. A more standard way to say "we stay here inside" would be "nos quedamos aquí dentro."