Could your statement be more wrong ?
To most people english is a foreign language which makes it improbable they would get a play on english slang words.
'bro' is not even loosely related to man: man is a pager interface for system documentation, it is standard, has existed for decades and comes with pretty much every *nixes and is related to the info command. The content man displays is written by knowledgeable people (developers, maintainers, etc.) and is split in several sections:
1 Executable programs or shell commands
2 System calls (functions provided by the kernel)
3 Library calls (functions within program libraries)
4 Special files (usually found in /dev)
5 File formats and conventions eg /etc/passwd
6 Games
7 Miscellaneous (including macro packages and conventions), e.g. man(7), groff(7)
8 System administration commands (usually only for root)
9 Kernel routines [Non standard]
On the other hand, bro is a brand new non standard ruby utility as an interface to a database of user provided one liner command examples ranked through a voting system that could probably be easily gamed. Its content right now is uncategorized and of dubious quality with some command not being working examples, some missing explanation to even being outright malicious.
Those two very different tools are hardly related in any way.
Lastly, fsck stands for file system check, its name is suited to its use and follows a tradition of clever naming which answer the need to be concise, indicative of its use and somewhat intuitive.
see cp for copy, mv for move, mkdir for make directory, cat for concatenate, chown for change ownership, du for disk usage, df for disk free, ls to list files, rm to remove files, rmdir to remove directories, sed for stream editor and so on.
Asking for a rename of fsck to love is just the perfect example against the point you're trying to make, that what you say is relevant to this discussion.