verb

• (obsolete) To lop; to prune.
  "The Papistes[…]though they be woll shrubbed, and shred, yet they begin euen nowe before the springe, to budde."
• (rare) To plant a shrub in a yard, garden, etc.; to prune a bush or other plant into a shrub.

verb

• (rare) To make or drink a shrub (liquor drink).

verb

• (ambitransitive, Kenya, slang) To mispronounce (a word or words) in another language in a manner that is influenced by one's mother tongue.
  "The people who benefit from making fun of shrubbing, therefore, are Kenyans who do not speak indigenous languages, because they are less likely to shrub than Kenyans who learned English as a second language in school and may have a heavier accent."

noun

• (Kenya, slang) A word mispronounced by replacing some consonant sounds with others of a similar place of articulation as influenced by one's mother tongue.
  "It is not only in face-to-face contexts that Kenyans police shrubbing; there are newspaper columns inviting readers to send in shrubs that they have witnessed, […]"