Isolated gastric outlet obstruction after 1 month of asymptomatic ingestion of corrosive is a rare phenomenon and rarely reported. In this type of cases, diagnosis is very difficult due to no symptoms at the time of poisoning, and biased history. We report a case of a young male presented with isolated gastric outlet obstruction after 1 month of asymptomatic ingestion of toilet cleaner, which was known to us later, mimicking linitis plastica. On upper endoscopy, the stomach was grossly edematous, antrum edematous and inflamed with reduced distensibility and narrow pyloric canal. Endoscopic ultrasound of the stomach revealed diffuse thickening of the gastric wall, mainly the antrum, involving submucosa and muscularis propria. We propose corrosive injury to be in the differential diagnosis of gastric linitis plastica.