(computing) a file extension

file (collection of papers) / (computing) file

An expansion or extension of range, scale or influence.

To extend a range, scale or influence.

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

a child / (figuratively) a girl, especially a dear or desired one (compare use of English baby, babe) / a smaller or younger version of a bigger object

What? What did you say?

whatchamacallit, X

(computing) a filename

(computing) text file