The 11th house is the house of gains, income, and fulfillment of desires. Saturn is the strict judge of Karma.
Dr. Sharma provides a highly specific and absolute dietary warning for anyone with Saturn in the 11th house. In Lal Kitab, consuming non-vegetarian food (specifically chicken/rooster) directly angers Saturn in this placement.
If a person with Saturn in the 11th eats chicken ("murga khayega"), they are inviting immediate financial and personal ruin. Dr. Sharma uses the humorous but terrifying phrase "tera kookdoo kadoo bol jayega" to mean that the person will be completely exposed, humiliated, and financially destroyed. Strict vegetarianism is the only way to protect their income.