Followspam is email or other notification generated by the action of following someone on a social network. Followspam happens when the account originating the follow action is used for spam, often a bambibot, SEObot or other bot utilizing an autofollow mechanism.
I'm so sick of all this followspam! The SEObots and bambibots are killing my inbox!
An SEObot is a subset of spambots most often found as accounts on social networks, or as webcrawlers used to game page ranking mechanisms in search. The typical social network SEObot is either trying to game, or trying to sell SEO services, often mixed with other spam.
Enough with the SEObots already -- Twitter really needs to kill the autofollow mechanism.